Unscrew the top portion of the tank, where the Kangertech logo is etched.
Once unscrewed, pull the cap upward to expose the filling slot.
Hold onto the grip area (where the slot is located) and rotate it in order to open the fill slot.
Fill the tank with your e-juice.
Rotate the grip portion to close off the filling slot.
Slide the outer casing back down towards the tank.
Screw the outer shell in order to seal it.